IONIC CONDUCTIVITY OF CHITOSAN/LiOH POLYMER MEMBRANE DISPERSED SILICA FLY ASH AS SOLID ELECTROLYTE MATERIAL FOR SECONDARY BATTERY

Kartika Sari; Sunardi Sunardi; Annisa Nandhita Kurniawati; Muflihatun Muflihatun; Rosi Widarawati; Agung Bambang Setio Utomo; Evi Yulianti

Kartika Sari Department of Physics, Faculty of Mathematics and Natural Science, Universitas Jenderal Soedirman, Purwokerto, Indonesia
Sunardi Sunardi Department of Physics, Faculty of Mathematics and Natural Science, Universitas Jenderal Soedirman, Purwokerto, Indonesia
Annisa Nandhita Kurniawati Department of Physics, Faculty of Mathematics and Natural Science, Universitas Jenderal Soedirman, Purwokerto, Indonesia
Muflihatun Muflihatun Department of Physics, Faculty of Mathematics and Natural Science, Universitas Jenderal Soedirman, Purwokerto, Indonesia
Rosi Widarawati Agrotechnology study program, Faculty of Agriculture, Universitas Jenderal Soedirman, Purwokerto, Indonesia
Agung Bambang Setio Utomo Department of Physics, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada, Yogyakarta, Indonesia
Evi Yulianti National Research and Innovation Agency (BRIN), PRMM: Advanced Materials Research Center, Tangerang, Indonesia

Abstract

One of the components of the secondary battery is the electrolyte, which acts as a bridge for ion movement within the battery. The electrolyte currently being developed is a membrane-type solid electrolyte. Membrane-type electrolytes can be modified by adding salts and inorganic fillers. The material of the solid electrolyte is chitosan modified by adding LiOH salt, and silica is added as an inorganic filler by solution casting. The silicon dioxide used is obtained from fly ash, a waste product of coal combustion with a silicon dioxide content of 65.97%. The silica contained in fly ash can be used as an inorganic filler in polymeric membranes. Variations in the addition of fly ash silica used are 0% and 12% with Electrochemical Impedance Spectroscopy (EIS) characterization. The results of the EIS characterization are aimed at determining the ionic conductivity value of the membrane. EIS characterization of chitosan, chitosan/LiOH, and chitosan/LiOH/12% silica fly ash membranes resulted in values of 1.275 x 10^-8, 3.824 x 10^-6, and 1.304 x 10^-4 S/cm, respectively. The increase in ionic conductivity with the addition of silica indicates that the presence of silica fly ash can affect the ionic conductivity values of the solid electrolyte polymer membrane.